I charged my iPad Pro (11") to 100% last night and left the pencil attached to it. By mid-day, the iPad was down to 85% battery, and I hadn't even touched it. It seems like just having the pencil attached has a significant effect on the iPad's battery life. Has anyone else noticed this? I wish there was a setting to decide whether the pencil should charge or not. I'm not a heavy pencil user, so most of the time I'd prioritize the iPad's battery over the pencil's. But it seems that by default, the pencil is drawing on the iPad's battery to keep its charge at 100%.